Information Technology Reference
In-Depth Information
FIGURE 6.3
Mounting rings are available in varieties for use during initial construction of a building. This is
a typical prewire ring. (Courtesy of ERICO, Inc.)
The flange protrudes forward from the wall support and is the right depth to
be flush with the front of the wall surface, when it is later attached. The top and
bottom edges of the ring have mounting holes to which the mounting screws of the
outlet attach.
Mounting rings for postwiring are also available. These rings have flexible metal
fingers at the top and bottom of the opening that are part of the stamping. A rectan-
gular hole of an appropriate size is cut into the wallboard. Then, the mounting ring is
placed in the hole until it is flush with the wall. The metal fingers are bent around into
the hole and back against the rear surface of the wallboard to secure the ring. An alter-
native design has a vertical screw slot incorporated into the metal fingers. After the
fingers are bent into the mounting hole, a provided screw clamps the front flange of
the ring tightly to the wall, using the slotted finger as a rear clamp. This prevents any
undesired movement in the ring that would occur with the other type of ring.
